LibraryChecker.py

import importlib.util
import os
import nltk


class LibraryChecker:

    def __init__(self):
        self.libraries = []
        if os.path.exists("requirements.txt"):
            with open("requirements.txt", "r") as required_libraries_reader:
                self.libraries.extend(required_libraries_reader)
        else:
            print("No requirements.txt file found")
            self.libraries = []
        self.check_libraries()
        self.download_nltk()

    def check_libraries (self):
        missing_libraries = []
        for lib in self.libraries:
            if importlib.util.find_spec(lib) is None:
                missing_libraries.append(lib)

        if missing_libraries:
            print("Libraries missing, please install it: {}".format(missing_libraries))
            os.system("pip install -r requirements.txt")

        else:
            print("All libraries are installed. we are starting elias")

    #Downloading Nltk-Model (German and English)
    def download_nltk(self):
        nltk_data_path = "./nltk_data/tokenizers/punkt/PY3/"

        if not os.path.exists(os.path.join(nltk_data_path, "english.pickle")):
            print("English tokenizer missing. Downloading...")
            nltk.download('punkt_tab')

        if not os.path.exists(os.path.join(nltk_data_path, "german.pickle")):
            print("German tokenizer missing. Downloading...")
            nltk.download('punkt')